Rainbow Electronics MAX5085 User Manual

General Description

The MAX5084/MAX5085 high-voltage linear regulators
operate from an input voltage range of 6.5V to 65V and
deliver up to 200mA of output current. These devices
consume only 50µA (typ) of quiescent current with no
load and 6µA (typ) in shutdown (EN pulled low). Both
devices include a SET input, which when connected to
ground, selects a preset output voltage of 5V
(MAX5084) or 3.3V (MAX5085). Alternatively, the out­put voltage can be adjusted from 2.54V to 11V
by connecting the SET pin to the regulator’s output
through a resistive divider network. The MAX5084/
MAX5085 also include an OUT_SENSE pin, which
allows remote voltage sensing right at the load, thus
eliminating the voltage drop caused by the line imped­ance. Both devices are short-circuit protected and
include thermal shutdown.

The MAX5084/MAX5085 operate over the -40°C to
+125°C automotive temperature range and are avail­able in a space-saving 3mm x 3mm thermally
enhanced 6-pin TDFN package.

Applications

Automotive

Industrial

Home Security

Telecom/Networking

Features

♦ Wide Operating Input Voltage Range (6.5V to 65V)

♦ Thermally Enhanced 3mm x 3mm 6-Pin TDFN

Package Dissipates 1.905W at +70°C

♦ Guaranteed 200mA Output Current

♦ 50µA No-Load Supply Current

♦ Preset 3.3V, 5.0V, or Adjustable (from 2.54V to 11V)

Output Voltage

♦ Remote Load Sense

♦ Thermal and Short-Circuit Protection

♦ -40°C to +125°C Operating Temperature Range

♦ SET Input for Adjustable Output Voltage

♦ Enable Input

MAX5084/MAX5085

65V, 200mA, Low-Quiescent-Current

Linear Regulators in TDFN

________________________________________________________________ Maxim Integrated Products 1

TOP VIEW

456

SET

OUT_SENSE

OUT

321

+

GND

EN

IN

TDFN

MAX5084
MAX5085

Pin Configuration

Ordering Information

VIN = 6.5V

TO 65V

5V (MAX5084)

3.3V (MAX5085)

10µF

10µF

OUT

OUT_SENSE

SET

IN

LOAD

EN

GND

MAX5084
MAX5085

Typical Operating Circuit

19-3928; Rev 0; 1/06

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

*EP = Exposed paddle.
+Denotes lead-free package.

PART

PIN-

PKG

CODE

M A X5 0 8 4 ATT+ T

T633-2

M A X5 0 8 5 ATT+ T

T633-2

Selector Guide appears at end of data sheet.

TEMP RANGE

- 40°C to + 125°C 6 TDFN-EP*

- 40°C to + 125°C 6 TDFN-EP*

PACKAGE

TOP

MARK

AJI

AJJ

MAX5084/MAX5085

65V, 200mA, Low-Quiescent-Current
Linear Regulators in TDFN

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN= 14V, I

OUT

= 1mA, CIN= C

OUT

= 10µF, VEN= 2.4V, TA= TJ= -40°C to +125°C, unless otherwise noted. Typical specifications

are at T

A

= +25°C, unless otherwise noted.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

IN to GND ...............................................................-0.3V to +80V

EN to GND..............................................................-0.3V to +80V

SET, OUT, OUT_SENSE

to GND................-0.3V to the lesser of (V

IN

+ 0.3V) or +13.2V

OUT_SENSE to OUT..............................................-0.3V to +0.3V

Short-Circuit Duration (V

IN

≤ 65V) ..............................Continuous

Maximum Current into Any Pin (except IN and OUT).......±20mA

Continuous Power Dissipation (T

A

= +70°C)

6-Pin TDFN-EP (derate 23.8mW/°C above +70°C) ...1904.8mW*

Thermal Resistance:

θJA................................................................................42°C/W

θ

JC

...............................................................................8.5°C/W

Operating Temperature Range .........................-40°C to +125°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER

CONDITIONS

UNITS

Input Voltage Range V

IN

VIN > V

OUT

+ 1.5V 6.5 65 V

I

OUT

= 0 51 140

I

OUT

= 100µA 51 140

µA

Supply Current I

Q

Measured at GND,
SET = GND

I

OUT

= 200mA 2 4 mA

Shutdown Supply Current

VEN ≤ 0.4V 6 16 µA

REGULATOR

Guaranteed Output Current

I

OUT

V

OUT

= V

OUT(NOM)

±4% 200 mA

VIN = 9V to 16V, SET = GND, I

OUT

= 5mA to 200mA,

OUT_SENSE connected to OUT (MAX5084)

4.8 5.0 5.2

V

I N

= 6.5V to 21V , S E T = GN D , I

OU T

= 5m A to 100m A,

OUT_SENSE connected to OUT (MAX5084)

5.0

VIN = 9V to 16V, SET = GND, I

OUT

= 5mA to 50mA,

OUT_SENSE connected to OUT (MAX5084)

4.9 5.1

Output Voltage Accuracy V

OUT

VIN = 6.5V, SET = GND, I

OUT

= 1mA to 200mA,

OUT_SENSE connected to OUT (MAX5085)

V

Output Voltage Range I

OUT

= 5mA, adjustable output

11 V

Dropout Voltage ∆V

DOIOUT

= 200mA, V

OUT

= 5V, MAX5084 (Note 2) 0.9 1.5 V

Startup Response Time

Rising edge of V

IN

to rising edge of V

OUT

,

R

L

= 500Ω (Note 3)

400 µs

MAX5084, SET = GND -1 +1

VIN from 8V to 65V

MAX5085, SET = GND

Line Regulation

∆V

IN

VIN from 14V to 65V

Adjustable output from

2.54V to 11V

mV/V

*As per JEDEC51 Standard (Multilayer Board).

SYMBOL

MIN TYP MAX

I

SHDN

∆V

/

OUT

4.85

3.168 3.300 3.432

2.54

-0.5 +0.5

-0.5 +0.5

5.15

MAX5084/MAX5085

65V, 200mA, Low-Quiescent-Current

Linear Regulators in TDFN

_______________________________________________________________________________________ 3

Note 1: Specifications at -40°C are guaranteed by design and not production tested.
Note 2: Dropout voltage is defined as (V

IN

- V

OUT

) when V

OUT

is 100mV below the value of V

OUT

when VIN= V

OUT

+ 3V.

Note 3: Startup time measured from 50% of V

IN

to 90% of V

OUT

.

ELECTRICAL CHARACTERISTICS (continued)

(VIN= 14V, I

OUT

= 1mA, CIN= C

OUT

= 10µF, VEN= 2.4V, TA= TJ= -40°C to +125°C, unless otherwise noted. Typical specifications

are at T

A

= +25°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Regulator on 2.4

Enable Voltage V

EN

Regulator off 0.4

V

VEN = 2.4V 0.5 1

VEN = 14V 4 8Enable Input Current I

EN

VEN = 65V 14 35

µA

OUT to OUT_SENSE
Internal Resistor

R

OUT_

I

OUT_SENSE

= 10mA 8 15 24 Ω

SET Reference Voltage V

SETIOUT

= 10mA

V

SET Input Leakage Current

I

SET

V

SET

= 1.251V

+1

nA

MAX5084, SET = GND 0.3 1

MAX5085, SET = GND 0.3 1

Load Regulation

I

OUT

from 1mA to
200mA, OUT_SENSE
= OUT

Adjustable output from

2.54V to 11V

0.5 2

mV/mA

Power-Supply Rejection
Ratio

PSRR

I

OUT

= 10mA, f = 100Hz, V

IN_RIPPLE

= 500mV

P-P

,

V

OUT

= 5V

55 dB

VIN = 8V to 14V 220 340 500

Short-Circuit Current I

SC

VIN = 65V 340

mA

Thermal Shutdown

°C

Thermal Shutdown
Hysteresis

10 °C

SENSE

∆V

/

OUT

∆I

OUT

T

SHDN

1.220 1.251 1.280

-100

+160

+100

T

HYST

MAX5084/MAX5085

65V, 200mA, Low-Quiescent-Current
Linear Regulators in TDFN

4 _______________________________________________________________________________________

Typical Operating Characteristics

(VIN= 14V, CIN= C

OUT

= 10µF, VEN= VIN, TA = +25°C, unless otherwise noted.)

OUTPUT VOLTAGE

vs. INPUT VOLTAGE

MAX5084 toc01

VIN (V)

V

OUT

(V)

605545 5015 20 25 30 35 405 10

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

0

065

I

OUT

= 0

NO-LOAD GROUND CURRENT

vs. TEMPERATURE

MAX5084 toc03

TEMPERATURE (°C)

I

GND

(µA)

12511080 95-10 5 20 35 50 65-25

10

20

30

40

50

60

70

80

90

100

0

-40 140

VIN = 65V

VIN = 14V

VIN = 6.5V

SHUTDOWN SUPPLY CURRENT

vs. TEMPERATURE

MAX5084 toc03

TEMPERATURE (°C)

I

GND

(µA)

12511080 95-10 5 20 35 50 65-25

1

2

3

4

5

6

7

8

9

10

0

-40 140

OUTPUT VOLTAGE

vs. TEMPERATURE

MAX5084 toc04

TEMPERATURE (°C)

V

OUT

(V)

12511080 95-10 5 20 35 50 65-25

4.80

4.85

4.90

4.95

5.00

5.05

5.10

5.15

5.20

5.25

4.75

-40 140

I

OUT

= 1mA

I

OUT

= 10mA

GROUND CURRENT

vs. TEMPERATURE

MAX5084 toc05

I

GND

(µA)

0.25

0.50

0.75

1.00

1.25

1.50

1.75

2.00

2.25

0

TEMPERATURE (°C)

12511080 95-10 5 20 355065-25-40 140

I

OUT

= 200mA

I

OUT

= 100mA

I

OUT

= 50mA

OUTPUT VOLTAGE

vs. LOAD CURRENT AND TEMPERATURE

MAX5084 toc06

TEMPERATURE (°C)

V

OUT

(V)

12511080 95-10 5 20 35 50 65-25

4.80

4.85

4.90

4.95

5.00

5.05

5.10

5.15

5.20

5.25

4.75

-40 140

I

OUT

= 100mA

I

OUT

= 200mA

I

OUT

= 50mA

DROPOUT VOLTAGE

vs. LOAD CURRENT

MAX5084 toc07

I

OUT

(mA)

V

DROPOUT

(V)

190170130 15050 70 90 11030

0.15

0.30

0.45

0.60

0.75

0.90

1.05

1.20

1.35

1.50

0

10

V

OUT

= 5V

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

MAX5084 toc08

FREQUENCY (kHz)

PSRR (dB)

100101

-70

-60

-50

-40

-30

-20

-10

0

-80

0.1 1000

I

OUT

= 10mA

LINE-TRANSIENT RESPONSE

MAX5084 toc09

400µs/div

0A

I

OUT

100mA/div

V

OUT

100mV/div
AC-COUPLED